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Optimisation of ultrasonic‐assisted extraction of natural dyes from pomegranate rind using response surface methodology and its characterisation
Coloration Technology ( IF 1.8 ) Pub Date : 2021-02-14 , DOI: 10.1111/cote.12528
TengFei Lei 1 , Ying Pan 1, 2 , Bin Zhang 1 , RongZhan Liu 1, 3 , YuanFeng Pan 4
Affiliation  

This paper reports the optimal ultrasonic‐assisted extraction (UAE) conditions for the maximum recovery of natural dyes from pomegranate rind using response surface methodology. The optimum UAE conditions were found to be an extraction time of 60 minutes, an extraction temperature of 65°C, a water to material ratio of 19 mL/g and an ultrasonic power of 132 W. The yield of the extracted pomegranate rind dyes (PRD) under optimum conditions was 17.1% ± 0.1%, which closely agrees with the predicted value of 17.2%. Fourier Transform–infrared and ultraviolet‐visible absorption spectroscopy indicated that there were no significant structural changes in the PRD under optimal UAE conditions. The PRD particle size was clearly reduced, and the distribution was more uniform under the action of the ultrasonic waves. The total anti‐oxidant activity of the PRD was analysed using DPPH• assay, and the results indicated that a proper and reasonable ultrasonic‐assisted treatment can enhance the anti‐oxidant capacity of the pomegranate rind natural dyes. Furthermore, in comparison with Staphylococcus aureus using the Agar plate method, the anti‐bacterial activity indicated that the fabrics dyed with PRD under UAE conditions displayed outstanding anti‐bacterial activity.

中文翻译:

响应面法优化超声辅助石榴皮中天然染料的提取及其表征

本文报告了使用响应面方法从石榴皮中最大程度回收天然染料的最佳超声辅助提取(UAE)条件。发现最佳的阿联酋条件是提取时间为60分钟,提取温度为65°C,水与材料之比为19 mL / g,超声功率为132 W.最佳条件下的PRD)为17.1%±0.1%,与17.2%的预测值非常吻合。傅立叶变换红外和紫外可见吸收光谱表明,在最佳阿联酋条件下,珠三角没有明显的结构变化。PRD粒径明显减小,并且在超声波的作用下分布更加均匀。使用DPPH•分析法对珠三角的总抗氧化活性进行了分析,结果表明,适当而合理的超声辅助处理可以增强石榴皮天然染料的抗氧化能力。此外,与使用琼脂平板法检测金黄色葡萄球菌,其抗菌活性表明在阿联酋条件下用PRD染色的织物表现出出色的抗菌活性。
更新日期:2021-02-14
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